Offset disk harrow



Aprilv 16, 1957 K. G. KIRCHNER OFFSET DISK HARROW 2 Sheets-Sheet l FiledNOV. 4, 1955 Til i Il A //v VEA/Tof? KENNETH a K/RcH/VER A AroR/VEYApril 16, 1957 K. G. KIRCHNER OFFSET DISK HARROW 2 Sheets-Sheet 2 FiledNov. 4, 1953 /lVVENTO/P KENNETH G. K/RCH/VE/P TTOH/VEY United StatesPatent O OFFSET DISKv HARROW Kenneth@- K'ircliuer. Stockton; Calif-,-assigner to International Harvester' Company,l a corporation of New IeSApplication November 4,1953, vSerialV No. 393,174]V 3" Claims. (ci.97-.47520 This inventiony relates to agricultural implements andparticularlyy to: an implement of the offset' disk harrow type adaptedtoV be mounted` integrally with aY tractor to be carried thereby intransport. More specically the invention concerns an implementadaptedparticularly for mounting. upon a tractor equipped with ahitchmechanism of the two-point type.

Versatility inanimplementV such as an offset disk harrow, which' isuse-fulin cultivating orchards andthe like,

animportant feature since the implement is often operated on either sideot the tractor upon which it is mounted. v

Anf object' ofV the present invention is the provision of an improvedtractor implement of the oset disk harrow' type wherein twolongitudinally spaced gangs of disks are operated' at anangle toeachlother and wherein means are provided foradjusting thel relativepositions o' the'disks.

Another object of the inventionis the provision in an integral tractordisk' barrow of novelV means for adjustingthe positionof? theearth-Working tools relative to the tractor.

Another object of the invention is the provision in a tractor offset'disk harrow, wherein means are provided for operating the harrow oneither side of a longitudinal center line through the tractor, of meansfor laterally adjusting the tool gangs relative to the tractor, and foradjusting the longitudinal spacing between the earth-working toolsandthe tractor wheels to avoid contact therewith;

Another object of the invention is the provision of irnproved means forlaterally adjusting the gangs of an odset harrow with respect to thetractor upon which itis mounted, and means for securing theearth-workingtoolsin a selected laterally adjusted position,

Other objects and advantages of the invention will'become clear from thefollowing detailed description when read in conjunction withf theaccompanying drawings, wherein:

Fig. l is a viewin side elevation'of the rear end of a tractor havingatractor-attaching mechanism orhitch structure,- and havingv mountedthereon an implement embodying the features of this'invention.

Fig. 2 is a plan View of theetractor oset disk barrow of this invention,and-showing a portion of the sockets of the tractor two-point attachinglmechanism, and

Fig. 3-is-asection taken onthe line 3-3 of Fig. l-.

Referring to the drawings, it will be observed that the numeral 1i)designates the longitudinally extending body ofV a tractor having atransverse rear axle 11 carrying laterally spaced drive Wheels 12, onlyone ofv which is shown.

Mounted upon and forming afpart lot' the tractorV is an implementattaching structure generally designated by the numeral 13 andcomprising a yoke shaped drawbar 14 having rearwardly extendinglaterally spaced arms 15 to the ends of which are secured socket members16. The details of construction of the tractor hitch structure 2,788,730referred Apr- 16,1957

,i ice 2. 13 are .Ore fully described? r a @Pending apnlsatih, senat No.338,651, ineay February 25, i953.. nj win' ige b riey noted, however,that the drawbar 14 is pivo ily connected to. a draft memberjl'eohnecredV to theV tractor bodyT in advance of. the rear axle tliereor';

Eor'raising and lowering of drawbar 14 andgheiefore, of thev socketmembers 16, orde'rto properly positionV the hitch mechanism verticallyto facilitate attachmentv of' an implement thereto; a transverse'rfockshaft 118 isgprovidecl' and mionrflted'in two ein; more brackets'19 ai'xed to the tractor body. Lift arms 20 at the ends of thelrockshaft 1Sv are connectedv by; links;l 21 with the ends of the drawbararms 115.'. Rocking of the shaft'v 18 t`o` raise and lower thedrawbar'is eiected by a hydraulic ram 224 anchored at itslowerend to thetractor and1 connected4 at its upper endv to a lift link 23 which, in'turn, is connected by a rod` 24 with an arm 2 5 a'iixecly to therockshaft 18. 'Fluid' under pressure is suppliedL to the ran-1v 22- inany suitable manner to raise'and lower the link 23 about its pivot onthe tractor and' therefore alsvorai'se and lower the arm 25to therockshaft 1S.

The implement With which the present invention concerned is` anr olsetdisk harrowgenerallyy designated. by 26 and includes a hitch frame V27.Hitch frame 27 corriprisesl a rigid transverse bar 28 provided at'y itsends with vertical spindlegportionsfZQcarrying, respectively, spindles36;* The vertical portions 29- are rigid with the.` end s'of the bar 2%and have aiixed thereto, as byV welding, and extending forwardlytherefrom,rlaterally spaced parallel shaft members 31 adapted forslidingfreception in' the respectiveV sockets 16, andV provided: with`notches 3 2 cooperatingl with latch mechanism 33 carriedY bytheelongatedsockets to rigidly hold the'` shafts in said" sockets andrender the hitch frame 27 unitary with thetractr attachingV structure131 It will be observed that the sockets 16 are elongated andreceivetherein'a major poi"- tion of the shafts 31 to'provide astableconnection between the'- tractor andimplement whereby theimplement may be4 raised and lowered between operating andtransportpositions relative to the` tractor, and maybe transported thereby.l Y

Vertical spindles- 3l! are pivotally received in bearings 54integralwith the forward'ends', respectivelnot a pair oflaterallyspaced, parallel beamsor supporting-linkss which' are horizontallyvdisposed and"- extend longitudinally rearwardly from the hitch frame 27for lateral Vswinging movement about the axes'of the spindles V3:9.

Each of the beams 35 consists of a channel shaped sleeve portion andachannel shaped shaft portion 37 receivable between the angesf of the sleeveportion. The rear ends ofeachof the shaft parts 37 have attachedthereto aV vertical bearing 3S in whichrispirvotally received a pivotpin 39. The pivotfpi'nsg3`9v` are axed toi and project upwardlyfromopposite ends ifaV 4transbananrlA support at their ends a diagonallyentending shaft: 51?4 carrying at spaced' locationsthereon earthpenetrating disks 52, the latter gang of disks being generallydesignated by the numeral 53 and being disposed at an angle with respectto the forward gang of disks, generally designated by the numeral 54.

The angle bars 40 and 44 are adjustably secured laterally with respectto the tractor.

noted that adjustment of the rear gang 53 relative to l lthe front gang54 about a longitudinal horizontal axis may be made by retaining thecentral bolt 56 as a pivot,

moving the flanking .bolts in slots 57 provided in the angle vbar 44 andregistering with openings 55 in the angle bar 40.

This levels the gangs with respect to each other. As pointed out beforethe part 37 of the beam 35 is slidable in the part 36. The part 37 isheld against dishplacement and guided in the channel member 36 by theprovision of a pair of retainers 53 carried by each of the channels 36.The bearing member 38 at the end of the slidable channel 37 is retainedby the provision of a U-shaped cap 59, rotatably receiving spindle 39,and provided with legs 60 aflxed as by welding to the angle bar 40. Itshould also be noted that the channel member 36 is further bracedV onthe pivot pin or spindle 30 by the provision of a triangular bracingmember 61 alixed to the forward end of the member 36 and having abearing portion 62 rotatably carrying the lower end of the spindle 30.

The telescoping of the parts 37 with respect to the parts 36 of thebeams 35 accommodates longitudinal adjustment of the tool gangs 53 and54 relative to the hitch frame 27, and the tractor. This adjustment isaccomplished by the provision of a plurality of openings 63 in the part36 registerable with a plurality of openings 64 in the part 37. Bolts 65Yare passed through the retainers 58 for reception in registeringopenings in the telescoping parts When the parts have been adjusted toselected positions.

Thisadjustment becomes necessary when the parallel beams or links 35 areswung laterally about the pivots 30 t0 positions such as indicated indotted lines in Fig. 2 Where the entire tool-carrying frame has Vbeenmoved The implement is retained in its laterally adjusted position bythe provision of a diagonal brace 66 which comprises a shaft part 67slidable in and telescoping with respect to a sleeve 68, the formerbeing pivotally attached to the `left hand channel member 36 near itsforward end and the sleeve 68 being pivotally attached to the right handchannel member 36 near its rear end. A plurality of suitable registeringopenings are provided in the sleeve 68 and the shaft 67 for thereception of a pin 69 for holding the telescoping parts in a selectedposition. In the movement ot the implement from the solid line positionof Fig. 2, to the dotted line position thereof, it will be noted thatthe telescoping brace 66 is adjusted to the dotted line positionthereof.

Release'of the implement from the tractor is accom- Y plished simply byreleasing the latch 33 and driving the this invention will be clearlyunderstood from the foregoing description. It should likewise beunderstood, however, that modifications may be made in the invention 4without departing from the spirit thereof or the scope of the appendedclaims. Y

What is claimed is:

1. An implement adapted for integral connection to a tractor having anattaching structure, comprising a hitch frame including laterally spacedattaching elements for connection to the tractor attaching structure, afirst pair of laterally spaced generally parallel horizontally disposedlinks pivotally connected to said hitch frame on vertical axes forlateral swinging relative thereto and extending rearwardly therefrom, asecond pair of laterally spaced links telescopically associated withsaid first links, a tool-supporting frame pivotally mounted on saidsecond links on vertical axes to accommodate lateral swinging thereof,means for rigidly securing said second links in selected adjustedpositions with respect to said first links to regulate the longitudinalspacing between the toolsupporting frame and the tractor upon swingingsaid first links laterally, said tool-supporting frame including forwardand rearward tool-carrying sections, connecting means between saidsections accommodating relative adjustment thereof about a longitudinalaxis, said connecting means including means for holding said sections ina selected adjusted position.

2. An implement adapted for integral connection to a tractor having anattaching structure, comprising a hitch frame including laterally spacedattaching elements for connection to the tractor attaching structure, afirst pair of laterally spaced generally parallel horizontally disposedlinks pivotally connected to said hitch frame on vertical axes forlateral swinging relative thereto and eX- tending rearwardly therefrom,a second pair of laterally spaced links telescopically associated withthe respective of said rst links, a tool-supporting frame pivotallymounted on said second links on vertical axes to accommodate lateralswinging thereof, means for rigidly securing said second links inselected adjusted positions with respect to'said first links to regulatethe longitudinal spacing be- I tween the tool-supporting frame and' thetractor upon swinging said rst links laterally, and an adjustable braceextending diagonally between said first links for holding the latteragainst lateral swinging, said tool-supporting frame including forwardand rearward tool-carrying sections, centrally disposed pivot meansconnecting said sections to accommodate relative adjustment therebetweenabout a longitudinal axis, one of said sections having verticallyextending slots therein and the other said section having bolt meansreceivable in said slots forholding said sections in selected adjustedpositions.

3. The invention set forth in claim 2, wherein said connecting meansincludes means accommodating bodily adjustment of one of said sectionslaterally relative to the other.

References cited in the fue of this patent UNITED STATES PATENTS 4%..;ewan.

